Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Operating principles and typical forms of
interlocking devices associated with guards
4.1 Interlocking principles
4.2 Typical forms of interlocking devices
4.3 Technological forms of interlocking devices
5 Provisions for the design of interlocking
devices (independent of the nature of the
energy source)
5.1 Actuation modes of mechanically actuated
position detectors
5.2 Arrangement and fastening of
position detectors
5.3 Arrangement and fastening of cams
5.4 Reducing the possibility of
common cause failures
5.5 Guard locking device
5.6 Delay devices
5.7 Design to minimize defeat possibilities
5.8 Environmental considerations
6 Additional technological requirements
for electrical interlocking devices
6.1 Compliance with EN 60204-1
6.2 Interlocking devices incorporating
mechanically actuated position switches
6.3 Interlocking devices incorporating
non-mechanically actuated position switches
(proximity switches and magnetic switches)
7 Selection of an interlocking device
7.1 General
7.2 Conditions of use and intended use
7.3 Risk assessment
7.4 Stopping time and access time
7.5 Frequency of access (frequency of opening
the guard for access to the danger zone)
7.6 Performance considerations
Annex A (informative) Guard-operated
interlocking device with one single cam-operated
position detector
Annex B (informative) Guard-operated interlocking
device with tongue-operated switch
Annex C (informative) Direct (mechanical)
interlocking between guard and start/stop manual
control
Annex D (informative) Captive-key interlocking device
Annex E (informative) Trapped-key interlocking device
Annex F (informative) Plug and socket interlocking
device [plug/socket combination]
Annex G (informative) Guard-operated interlocking
device incorporating two cam-operated
position detectors
Annex H (informative) Mechanical interlocking
between a guard and a movable element
Annex J (informative) Electrical interlocking
device incorporating magnetically actuated
[magnetic] switches
Annex K (informative) Electrical interlocking
device incorporating two proximity detectors
Annex L (informative) Pneumatic/hydraulic
interlocking devices
Annex M (informative) Interlocking device with
spring applied/power released guard locking
device
Annex N (informative) Interlocking device with
guard locking, with manually operated delay
device
Annex ZA (informative) Relationship between
this European Standard and the Essential
Requirements of EU Directive 98/37/EC
Annex ZB (informative) Relationship between
this European Standard and the Essential
Requirements of EU Directive 2006/42/EC
Bibliography
National Annex NA (informative) Bibliography